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Randomised controlled trial of butterbur and cetirizine for treating seasonal allergic rhinitis.
BMJ. 2002 Jan 19;324(7330):144-6. doi: 10.1136/bmj.324.7330.144.
BMJ. 2002.
PMID: 11799030
Free PMC article.
Clinical Trial.
Butterbur Ze339 for the treatment of intermittent allergic rhinitis: dose-dependent efficacy in a prospective, randomized, double-blind, placebo-controlled study.
Schapowal A; Petasites Study Group.
Schapowal A, et al.
Arch Otolaryngol Head Neck Surg. 2004 Dec;130(12):1381-6. doi: 10.1001/archotol.130.12.1381.
Arch Otolaryngol Head Neck Surg. 2004.
PMID: 15611396
Clinical Trial.
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